Abstract
The paper reviews the results of recent studies of optical-damage-resistant LiNbO3:Me crystals, with Me standing for Mg, Zn, In, Sc. The effects of Me ions on LiNbO3 are very similar. This similarity manifests itself drastically in photorefractive, optical and nonlinear optical properties. The resemblance of these effects is due to a common influence of Me impurities on the intrinsic lattice defects NbLi.